CN111764706A

CN111764706A - Stage folding table mouth

Info

Publication number: CN111764706A
Application number: CN202010482692.3A
Authority: CN
Inventors: 何晓新; 徐慧文; 张昭; 赵利珍; 姜丁瑞; 徐欣; 方慧丽; 鲁维威
Original assignee: Zhejiang Dafeng Industry Co Ltd
Current assignee: Zhejiang Dafeng Industry Co Ltd
Priority date: 2020-06-01
Filing date: 2020-06-01
Publication date: 2020-10-13
Anticipated expiration: 2040-06-01
Also published as: WO2021244021A1; CN111764706B

Abstract

The invention discloses a stage folding platform opening, which comprises a vertical frame, wherein a platform opening used for corresponding to a performance area on a stage is arranged on the vertical frame, an eave curtain is arranged above the platform opening on the vertical frame, a lifting mechanism used for driving the eave curtain is arranged on the vertical frame, and the lifting mechanism drives the eave curtain to downwards expand along the height direction of the platform opening to cover the platform opening or fold along the height direction of the platform opening to a space below the avoided platform opening. The invention provides a stage folding platform opening, which can form the modeling of the cornice platform opening on the platform opening by arranging the cornice curtain, can form dynamic change by the lifting of the cornice curtain, is suitable for the performance of different stage scenes, can be used as the closed separation of the platform opening when the cornice curtain is unfolded downwards until the platform opening is completely shielded, and is convenient to transport and store during non-stage performance after the cornice curtain is completely unfolded downwards, so that the platform opening can be flexibly adjusted to meet the use of various stage scenes.

Description

Stage folding table mouth

Technical Field

The invention relates to the technical field of stage performance equipment, in particular to a stage folding table mouth.

Background

The false platform opening is equipment for installing stage lighting facilities commonly used in theaters, and the false platform opening mainly has the functions of installing lamps on the inner side of the platform opening and adjusting the size of the performance platform opening so as to meet the performance requirements of different theaters. The false table mouth can be divided into a fixed type and a movable type according to the installation form, the fixed type is usually used for small theaters, and the movable type is mostly used for large and medium theaters to adjust the size of the table mouth.

The application range of the existing movable false platform opening is restricted by multiple factors due to the requirements on building space and the complexity of the structure of the false platform opening. At present, a movable false table mouth which has a simple structure and can perform multi-dimensional adjustment on the false table mouth is not seen in the industry, so that the application occasions are wider.

In addition, the existing false platform opening has a single shape and cannot meet the use requirements of different stage scenes.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art: the stage folding platform opening is flexible and adjustable in false platform opening and simple in structure, and therefore the use of various stage scenes is met.

Therefore, an object of the present invention is to provide a stage false mouth, which includes a vertical frame, wherein the vertical frame is provided with a mouth corresponding to a performance area on a stage, and the stage false mouth is characterized in that: the cornice curtain is arranged above the platform opening on the vertical frame, a lifting mechanism used for driving the cornice curtain is arranged on the vertical frame, and the lifting mechanism drives the cornice curtain to be downwards unfolded along the height direction of the platform opening to the position where the platform opening is shielded or folded along the height direction of the platform opening to the position where the lower part of the platform opening is avoided. Through setting up the modeling that the eaves curtain not only can form the eaves platform mouth on the false platform mouth, can form dynamic change through the lift of eaves curtain moreover, the performance of adaptation different stage scenes, the eaves curtain expandes downwards in addition and can also be as the sealed separation of platform mouth until sheltering from the platform mouth completely, and the transportation when also being convenient for non-stage performance is deposited after the eaves curtain is flat and flat down completely simultaneously.

According to one example of the invention, the cornice curtain comprises an upper cross beam, a lower cross beam which is arranged below the upper cross beam and is parallel to the upper cross beam, and a plurality of vertical baffle assemblies which are arranged between the upper cross beam and the lower cross beam, wherein all the vertical baffle assemblies are sequentially arranged along the horizontal direction;

the vertical gear components comprise upper vertical gears and lower vertical gears, the upper ends of the upper vertical gears are hinged with the upper cross beam, the lower ends of the upper vertical gears are hinged with the upper ends of the lower vertical gears, the lower ends of the lower vertical gears are hinged with the lower cross beam, and the sum of the lengths of the upper vertical gears and the lower vertical gears of the vertical gear components is equal;

the upper cross beam is fixedly connected with the vertical frame, and the lifting mechanism is connected with the lower cross beam so that the lower cross beam can lift along the height direction of the platform opening. Through the structural design of this cornice curtain, can accomplish figurative change through the lift of bottom end rail, consequently make overall structure simple on the basis of the molding change demand that satisfies the cornice curtain.

Preferably, the length of the upper vertical rail in all the vertical rail assemblies decreases from the middle position to the two side positions in sequence along the width direction of the platform opening.

Preferably, the lifting mechanism comprises a winch driven by a motor and a strip-shaped inhaul cable, the lower end of the inhaul cable is connected with the lower cross beam, the upper end of the inhaul cable is wound on the winch and connected with the winch, and the winch drives the lower cross beam to lift through the inhaul cable. The electric capstan drives the winding and unwinding of the stay cable to realize the lifting of the lower cross beam connected with the stay cable, the mode has the advantages of few required parts, simple structure and convenience in arrangement on the stage.

Preferably, the lifting mechanism comprises a lifting driving motor and an annular chain, a driving chain wheel and a driven chain wheel are respectively arranged above and below the lower cross beam on the vertical frame, two ends of the chain are respectively wound on the driving chain wheel and the driven chain wheel, the lower cross beam is fixedly connected with the chain, and an output shaft of the lifting driving motor is connected with the driving chain wheel. Through annular chain setting, can realize the entablature and the demand of descending, simultaneously because the chain both ends are tight through the sprocket rises, consequently the rocking of entablature is little, in addition, this annular chain can make the entablature force down than ordinary cable, avoids owing to only rely on the entablature self gravity to bring down obstructed problem down.

Preferably, the lifting driving motor is one and is provided with two output shafts, the number of the chains is two, the two chains are respectively arranged on two sides of the cornice curtain along the width direction of the platform opening, the two chains are connected with the corresponding driving chain wheels, and the two driving chain wheels are respectively connected with the two output shafts of the lifting driving motor. The two ends of the lower beam are driven by the double-chain structure, the lifting process of the lower beam is more stable, and the lower beam is driven by the same driving motor, so that the synchronism is better.

According to one example of the invention, the vertical frame comprises a top plate and at least two side plates, the upper end of each side plate is connected with the top plate, a platform opening is formed between every two adjacent side plates, rollers are arranged at the bottoms of the side plates, a travelling mechanism which is movably matched with a truss on the top of the stage is arranged on the top plate, and the travelling mechanism drives the vertical frame and the cornice curtain on the vertical frame to move. Through the setting of gyro wheel and running gear, can realize the portable of whole false platform mouth, not only at stage installation or dismantle the installation and the removal of stage convenience false platform mouth, also can realize the removal of false platform mouth at the in-process of stage performance moreover to satisfy the different demands of stage performance different time quantums to false platform mouth position.

According to an example of the invention, the stand is provided with a platform opening slide sheet capable of translating along the width direction of the platform opening, and a part of the platform opening slide sheet extends into the platform opening or is reset to be hidden on the stand along with the movement of the platform opening slide sheet. The size of the width direction of the platform opening can be changed by arranging the platform opening sliding sheet.

Preferably, the number of the platform opening slide sheets is two, and the two platform opening slide sheets are respectively positioned on two sides of the platform opening in the width direction.

According to an example of the invention, a winding drum curtain is arranged on the stand at the upper part of the platform opening and behind the cornice curtain along the depth direction of the platform opening, and the winding drum curtain and the cornice curtain are arranged at intervals;

the reel curtain includes that curtain, spool and reel motor constitute, and the curtain is convoluteed outside the spool, spool and grudging post normal running fit, reel motor and grudging post are fixed continuous, just the spool motor orders about the spool and just reverses, so that the curtain responds spool corotation to launch down or responds the spool reversal to roll up the roll-up. The vision inside and outside the platform opening can be better realized through the addition of the winding drum curtain, and the winding drum curtain can be matched with the cornice curtain for use or used independently, so that the universality of the product is better.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

The technical scheme has the following advantages or beneficial effects: firstly, on the basis of traditional false platform mouth, add the cornice curtain that can adjust self molding in a flexible way, improve stage bandwagon effect, secondly, the cornice curtain can be launched completely downwards and be vertical flat state, this not only can realize closing of platform mouth on the stage is used, convenient collection and transportation under the non-stage performance condition moreover, its occupation space is little, finally, through the structural design to hoist mechanism and cornice curtain, make the required simple structure of the lift action of cornice curtain, reduce the manufacturing cost of whole false platform mouth.

Drawings

FIG. 1 is a schematic structural view of the false platform opening with the cornice curtain facing downwards to cover the platform opening.

Fig. 2 is a schematic structural view of the false table opening with the upward folded cornice curtain.

Fig. 3 is a partially enlarged view of the region "a" in fig. 1.

Fig. 4 is a partially enlarged view of the region "B" in fig. 1.

FIG. 5 is a schematic cross-sectional view taken in the direction "C-C" of FIG. 1.

Fig. 6 is a partially enlarged view of the region "D" in fig. 1.

Fig. 7 is a side view of fig. 2.

Fig. 8 is a partially enlarged view of the region "E" in fig. 7.

Fig. 9 is a schematic structural view of the cornice curtain of the present invention.

Wherein,

100. a vertical frame 100-1, a platform opening 101, a top piece 102 and a side piece;

200. the eave curtain comprises a 201 upper beam, 202 lower beam, 203 vertical rail component, 2031 upper vertical rail, 2032 lower vertical rail;

300. the lifting mechanism 301 comprises a lifting driving motor 302, a chain 303, a driving chain wheel 304, a driven chain wheel 305 and a transmission shaft;

400. a roller;

500. a truss;

600. a traveling mechanism;

700. a platform opening slip sheet;

800. roll screen, 801, curtain, 802, reel.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

A stage folding stage mouth according to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

The height direction of the table top described hereinafter refers to the up-down direction of the paper in fig. 2; the width direction of the platform opening refers to the left and right direction of the paper surface in fig. 2; the depth direction of the mesa is the right-left direction of the paper in the side view of fig. 7.

The first embodiment is as follows:

the invention provides a stage folding platform mouth, which comprises a vertical frame 100, wherein a platform mouth 100-1 corresponding to a performance area on a stage is arranged on the vertical frame 100, and the stage folding platform mouth is characterized in that: an eave curtain 200 is arranged above the platform opening 100-1 on the vertical frame 100, a lifting mechanism 300 for driving the eave curtain 200 is arranged on the vertical frame 100, and the lifting mechanism 300 drives the eave curtain 200 to downwards expand along the height direction of the platform opening 100-1 to cover the platform opening 100-1 or fold along the height direction of the platform opening 100-1 to avoid the space below the platform opening 100-1.

As shown in the figures, the stand 100 is in a door-shaped structure, specifically, the stand 100 includes a top plate 101 and at least two side plates 102, preferably, the two side plates 102 are arranged at intervals, the upper ends of the two side plates 102 are connected with the top plate 101, and the two adjacent side plates 102 and the top plate 101 together enclose to form a platform opening 100-1. The platform opening 100-1 is an open space channel between two side pieces 102 on the stand 100.

Example two:

the basic structure is the same as the first embodiment, except that: the cornice curtain 200 comprises an upper cross beam 201, a lower cross beam 202 and a plurality of vertical baffle assemblies 203, wherein the lower cross beam 202 is positioned below the upper cross beam 201 and is parallel to the upper cross beam 201, all the vertical baffle assemblies 203 are arranged between the upper cross beam 201 and the lower cross beam 202, and all the vertical baffle assemblies 203 are sequentially arranged along the width direction of a platform opening;

the vertical gear assembly 203 comprises an upper vertical gear 2031 and a lower vertical gear 2032, the upper end of the upper vertical gear 2031 is hinged with the upper cross beam 201, the lower end of the upper vertical gear 2031 is hinged with the upper end of the lower vertical gear 2032, the lower end of the lower vertical gear 2032 is hinged with the lower cross beam 202, and the sum of the lengths of the upper vertical gear 2031 and the lower vertical gear 2032 of each vertical gear assembly 203 is equal;

the upper cross beam 201 is fixedly connected with the stand 100, and the lifting mechanism 300 is connected with the lower cross beam 202 so that the lower cross beam 202 can lift along the height direction of the platform opening 100-1.

EXAMPLE III

The basic structure is the same as the embodiment, and the difference is that: the length of each upper rail 2031 of all the rail assemblies 203 decreases from the middle position to the two side positions in sequence along the width direction of the table top 100-1. That is, the length of the upper vertical rail 2031 in the vertical rail assembly 203 located at the middle position in the table mouth width direction is greater than the length of the upper vertical rail 2031 in the vertical rail assembly 203 located at the two end positions, and the length of the upper vertical rail 2031 in each vertical rail assembly 203 decreases from the middle position in order along the two end positions.

Example four

The basic structure is the same as the embodiment, and the difference is that: the lifting mechanism 300 comprises a winch driven by a motor and a strip-shaped inhaul cable, the lower end of the inhaul cable is connected with the lower cross beam, the upper end of the inhaul cable is wound on the winch and is connected with the winch, and the winch drives the lower cross beam to lift through the inhaul cable.

Preferably, the cable may be made of a rope, a steel wire, or the like, the upper end of the cable is fixed to the outer circumferential surface of the winch, and as the winch rotates, the upper portion of the cable is wound around the outer circumference of the winch, so that the cable is continuously wound by forward rotation of the winch, and the lower cross member 202 fixedly connected to the lower end of the cable is pulled upwards, or the winch rotates reversely, so that the portion of the cable outside the winch extends, and the lower cross member 202 descends under the action of the gravity of the lower cross member 202. This embodiment simple structure, only need purchase ready-made capstan winch with can satisfy the conventional cable of performance demand can, but bottom end fixed connection of bottom end rail 202 only with the cable, consequently rock easily at the in-process that promotes, the capstan winch is thrown the reversal that can be normal when the descending in-process of bottom end rail 202 meets trouble such as chucking in addition, consequently not only can't discover the trouble, if the bottom end rail 202 falls after the cable relaxes and causes the cable to receive the impact fracture easily, consequently, the security is relatively poor, need extra configuration safety protection mechanism.

EXAMPLE five

The basic structure is the same as the embodiment, and the difference is that: the lifting mechanism 300 comprises a lifting driving motor 301 and an annular chain 302, a driving chain wheel 303 and a driven chain wheel 304 are arranged on the vertical frame 100, the driving chain wheel 303 and the driven chain wheel 304 are respectively positioned above and below the lower cross beam 202, two ends of the chain 302 are respectively wound on the driving chain wheel 303 and the driven chain wheel 304, the lower cross beam 202 is fixedly connected with the chain 302, and an output shaft of the lifting driving motor 301 is connected with the driving chain wheel 303. The output shaft of the lifting drive motor 301 is connected with one end of the transmission shaft 305, and the other end of the transmission shaft 305 is connected with the central shaft of the drive sprocket 303, so that the drive sprocket 303 is driven to rotate around the axis of the drive sprocket 303 by the lifting drive motor 301.

As shown, preferably, the driving sprocket 303 is located above the lower cross beam 202, the driven sprocket 304 is located below the lower cross beam 202, the upper portion of the chain 302 is wound around the driving sprocket 303 from the upper portion of the driving sprocket 303, the lower portion of the chain 303 is wound around the driven sprocket 304 from the lower portion of the driven sprocket 304, and one end of the lower cross beam 202 is fixedly connected with the portion of the chain located between the driving sprocket 303 and the driven sprocket 304, so that the lower cross beam 202 performs an ascending and descending motion between the driving sprocket 303 and the driven sprocket 304 along with the motion of the chain.

Preferably, the lifting driving motor 301 is a driving motor with two output shafts, which is also called a double-head motor, the number of the chains 302 is two, the two chains 302 are respectively disposed on two sides of the cornice curtain 200 along the width direction of the platform opening, the two chains 302 are connected to the corresponding driving chain wheels 303, and the two driving chain wheels 303 are respectively connected to the two output shafts of the lifting driving motor 301.

EXAMPLE six

The basic structure is the same as the first embodiment, and the difference is that: the bottom of the side piece 102 is provided with a plurality of rollers 400, the top piece 101 is provided with a walking mechanism 600 movably matched with the truss 500 on the top of the stage, and the walking mechanism 600 drives the vertical frame 100 and the cornice curtain 200 on the vertical frame 100 to move.

Specifically, running gear makes grudging post 100 move for truss 500 along the horizontal direction, and this running gear 600 can be through electrically driven gear rack matched with mode relative motion, also can be through electrically driven gyro wheel and guide rail matched with mode relative motion, also can be through electrically driven belt and the mode relative motion of belt pulley, more can be through the flexible drive of cylinder, and this running gear 600 can be the arbitrary one that can satisfy two parts relative movement among the prior art, and this specific structure to running gear need not be repeated again.

EXAMPLE seven

The basic structure is the same as the first embodiment, and the difference is that: the vertical frame 100 is provided with a platform opening slide sheet 700 capable of translating along the width direction of the platform opening 100-1, and the part of the platform opening slide sheet 700 extends into the platform opening 100-1 or is reset to be hidden on the vertical frame 100 along with the movement of the platform opening slide sheet 700.

The extending and hiding means that as shown in fig. 5, the platform opening slide sheet 700 is located behind the vertical frame 100 along the depth direction of the platform opening 100-1, when the platform opening slide sheet 700 moves along the width direction of the platform opening 100-1, the audience is enabled to observe the performance in the platform opening 100-1 from the audience outside the platform opening 100-1 along the depth direction of the platform opening 100-1 and is blocked by the platform opening slide sheet 700, and the blocked area changes along with the movement of the platform opening slide sheet 700, that is, the number of parts of the platform opening slide sheet 700 extending into the platform opening along the width direction of the platform opening 100-1 is increased, the blocking part of the audience sight line is increased, and the width size of the platform opening is decreased in a relative sense; otherwise, the platform opening slide sheet 700 is retracted until hidden behind the vertical frame 100, and the platform opening 100-1 is completely in the sight of the audience.

Preferably, in this embodiment, there are two platform opening slide pieces 700, and the two platform opening slide pieces 700 are respectively located at two sides of the platform opening 100-1 in the width direction. The two stage port sliding pieces 700 are driven by respective drivers to move. The driver may be a motor driving a gear engaged with a rack, the motor being fixed to the stand 100, the rack being fixed to the table-top slider 700. Of course, any type of actuator known in the art that is capable of effecting relative movement of the components may be used.

Example eight

The basic structure is the same as the first embodiment, and the difference is that: a winding drum curtain 800 is arranged on the vertical frame 100 and is positioned at the upper part of the platform opening 100-1 and behind the cornice curtain 200 along the depth direction of the platform opening 100-1, and the winding drum curtain 800 and the cornice curtain 200 are arranged at intervals;

the roll screen 800 includes a screen 801, a reel 802 and a roll motor (not shown), the screen 801 is wound outside the reel 802, the reel 802 is rotatably fitted to the stand 100, the roll motor is fixedly connected to the stand 100, and the roll motor drives the reel 802 to rotate forward and backward, so that the screen 801 responds to the forward rotation of the reel 802 to unwind downward or responds to the reverse rotation of the reel 802 to wind upward.

It should be noted that, in the description of the present invention, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship indicated based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Various alterations and modifications will no doubt become apparent to those skilled in the art after having read the above description. Therefore, the appended claims should be construed to cover all such variations and modifications as fall within the true spirit and scope of the invention. Any and all equivalent ranges and contents within the scope of the claims should be considered to be within the intent and scope of the present invention.

Claims

1. The utility model provides a stage folding stage mouth, it includes grudging post (100), be equipped with on grudging post (100) and be used for with the corresponding stage mouth (100-1) of performance district on the stage, its characterized in that: the cornice curtain is characterized in that a cornice curtain (200) is arranged above a platform opening (100-1) on the vertical frame (100), a lifting mechanism (300) used for driving the cornice curtain (200) is arranged on the vertical frame (100), and the cornice curtain (200) is driven by the lifting mechanism (300) to be downwards unfolded to the shielding platform opening (100-1) along the height direction of the platform opening (100-1) or folded to the space below the avoiding platform opening (100-1) along the height direction of the platform opening (100-1).

2. A stage folding stage mouth as claimed in claim 1, wherein: the cornice curtain (200) comprises an upper cross beam (201), a lower cross beam (202) which is arranged below the upper cross beam (201) and is parallel to the upper cross beam (201), and a plurality of vertical baffle components (203) which are arranged between the upper cross beam (201) and the lower cross beam (202), wherein all the vertical baffle components (203) are sequentially arranged along the width direction of the platform opening;

the vertical gear component (203) comprises an upper vertical gear (2031) and a lower vertical gear (2032), the upper end of the upper vertical gear (2031) is hinged with the upper beam (201), the lower end of the upper vertical gear (2031) is hinged with the upper end of the lower vertical gear (2032), the lower end of the lower vertical gear (2032) is hinged with the lower beam (202), and the sum of the lengths of the upper vertical gear (2031) and the lower vertical gear (2032) of each vertical gear component (203) is equal;

the upper cross beam (201) is fixedly connected with the stand (100), and the lifting mechanism (300) is connected with the lower cross beam (202) so that the lower cross beam (202) can lift along the height direction of the platform opening (100-1).

3. A stage folding stage mouth as claimed in claim 2, wherein: the length of each upper vertical rail (2031) in all the vertical rail assemblies (203) decreases from the middle position to the two side positions in sequence along the width direction of the table opening (100-1).

4. A stage folding stage mouth as claimed in claim 2, wherein: the lifting mechanism (300) comprises an electrically-driven winch and a strip-shaped inhaul cable, the lower end of the inhaul cable is connected with the lower cross beam, the upper end of the inhaul cable is wound on the winch and is connected with the winch, and the winch drives the lower cross beam to lift through the inhaul cable.

5. A stage folding stage mouth as claimed in claim 2, wherein: lifting mechanism (300) is including promoting driving motor (301) and annular chain (302), be equipped with drive sprocket (303) and driven sprocket (304) on grudging post (100), drive sprocket (303) and driven sprocket (304) are located the top and the below of bottom end rail (202) respectively, the both ends of chain (302) are respectively around on drive sprocket (303) and driven sprocket (304), bottom end rail (202) and chain (302) fixed connection, the output shaft that promotes driving motor (301) links to each other with drive sprocket (303).

6. A stage folding stage mouth as claimed in claim 5, wherein: promote driving motor (301) for having the driving motor of two output shafts, chain (302) are two, and two chain (302) are located eaves curtain (200) respectively along the both sides of platform mouth width direction, and two chain (302) link to each other with drive sprocket (303) that correspond separately, and two drive sprocket (303) link to each other with two output shafts that promote driving motor (301) respectively.

7. A stage folding stage mouth as claimed in any one of claims 1 to 6, wherein: the stage eave curtain is characterized in that the vertical frame (100) comprises a top plate (101) and at least two side plates (102), the upper end of each side plate (102) is connected with the top plate (101), a platform opening (100-1) is formed between every two adjacent side plates (102), rollers (400) are arranged at the bottom of each side plate (102), a walking mechanism (600) which is movably matched with a truss (500) at the top of the stage is arranged on the top plate (101), and the walking mechanism (600) drives the vertical frame (100) to move together with the eave curtain (200) on the vertical frame (100).

8. A stage folding stage mouth as claimed in any one of claims 1 to 6, wherein: the platform opening sliding sheet (700) capable of translating along the width direction of the platform opening (100-1) is arranged on the vertical frame (100), and along with the movement of the platform opening sliding sheet (700), the part of the platform opening sliding sheet (700) extends into the platform opening (100-1) or is reset to be hidden on the vertical frame (100).

9. A stage folding stage mouth as claimed in claim 8, wherein: the number of the platform opening slide sheets (700) is two, and the two platform opening slide sheets (700) are respectively positioned on two sides of the platform opening (100-1) in the width direction.

10. A stage folding stage mouth as claimed in any one of claims 1 to 6, wherein: a winding drum curtain (800) is arranged on the vertical frame (100) and is positioned at the upper part of the platform opening (100-1) and behind the cornice curtain (200) along the depth direction of the platform opening (100-1), and the winding drum curtain (800) and the cornice curtain (200) are arranged at intervals;

reel curtain (800) include curtain (801), spool (802) and reel motor and constitute, curtain (801) are convoluteed outside spool (802), spool (802) and grudging post (100) normal running fit, and the reel motor links to each other with grudging post (100) is fixed, just the reel motor orders about spool (802) to rotate, so that curtain (801) response spool (802) forward rotation to expand downwards or response spool (802) reversal to roll up the roll-up.